You definition of DeFi covers everything about it but do you knows that defi in book and whitepaper differs from reality. The defi every investor want to associate their self with is the one that can be easily shilled, talk about and bring money to the table easily.
Otherwise, I wonder what used to happen after all the hype, the projects get pump and after a while, it gets dump back to where it began.
I have seen a defi project that has never gave up, which is Solana. They are gem penetrating every community without hype but real products of DeFi